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Finding the Fourth Proportional to 19,016.66, 28,509.56 and 7,931.66

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Solution

The fourth proportional to 19,016.66, 28,509.56 and 7,931.66 is: 11,891.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,016.66 : 28,509.56 = 7,931.66 : x
  2. Step 2: Convert to fraction form
    19,016.66/28,509.56 = 7,931.66/x
  3. Step 3: Cross multiply
    19,016.66x = 28,509.56 × 7,931.66
  4. Step 4: Simplify right side
    19,016.66x = 226,128,136.67
  5. Step 5: Solve for x
    x = 226,128,136.67/19,016.66
  6. Step 6: Final answer
    x = 11,891.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.